42251306417 has 2 divisors, whose sum is σ = 42251306418. Its totient is φ = 42251306416.

The previous prime is 42251306399. The next prime is 42251306431. The reversal of 42251306417 is 71460315224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40726872481 + 1524433936 = 201809^2 + 39044^2 .

It is a cyclic number.

It is not a de Polignac number, because 42251306417 - 2⁸ = 42251306161 is a prime.

It is not a weakly prime, because it can be changed into another prime (42251306017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21125653208 + 21125653209.

It is an arithmetic number, because the mean of its divisors is an integer number (21125653209).

Almost surely, 2^42251306417 is an apocalyptic number.

It is an amenable number.

42251306417 is a deficient number, since it is larger than the sum of its proper divisors (1).

42251306417 is an equidigital number, since it uses as much as digits as its factorization.

42251306417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 35.

The spelling of 42251306417 in words is "forty-two billion, two hundred fifty-one million, three hundred six thousand, four hundred seventeen".